Spec Clutch SZ133H Stage 2 Plus Performance Clutch Kit

The Spec Clutch SZ133H Stage 2 Plus Clutch Kit is a high-performance upgrade engineered to fill the gap between the Stage 2 and Stage 3 clutch systems. It delivers the smooth drivability and predictable engagement feel of a Stage 2 clutch while adding 15–20% more torque capacity, making it an ideal choice for enthusiasts who demand more from their drivetrain without sacrificing street manners.

At the core of this kit is a multi-friction disc in a full-faced configuration, combining carbon semi-metallic material on one side and Kevlar® on the other. This hybrid friction pairing leverages the heat resistance and bite of carbon semi-metallic material alongside the durability and smooth engagement characteristics of Kevlar for a well-rounded performance profile.

The disc hub is double-sprung with spring cover reliefs for added flexibility under load, while heat-treated internal components provide the strength and durability needed to withstand the demands of high-performance driving. The high-clamp pressure plate ensures firm, consistent clamping force across a wide range of applications and driving styles.

Key Features:

• Multi-friction disc with full-faced configuration — carbon semi-metallic on one side, Kevlar® on the other
• 15–20% higher torque capacity over the Stage 2 clutch kit
• High-clamp pressure plate for consistent clamping force
• Double-sprung hub with spring cover reliefs for enhanced flexibility
• Heat-treated components for long-term strength and durability
• Includes bearing and installation tool kit

Ideal Driving Applications:

• Street
• Drag Racing
• Autocross
• Road Racing
• Rally
• Pulling
• Drift

The Spec Clutch SZ133H is designed, hand-built, and tested in the USA, reflecting SPEC's commitment to precision manufacturing and performance-proven engineering.